An open-source Buffer alternative that lives on your server

What it does

Postiz is a self-hosted social media scheduler that lets teams draft, queue, and publish posts across X, Bluesky, Mastodon, LinkedIn, TikTok, Instagram, and others from a single dashboard. It bundles analytics, team collaboration, and AI-assisted writing. The stack is a TypeScript monorepo running Next.js and NestJS with Prisma over PostgreSQL.

The interesting bit

The project leans hard into automation: it offers a public API, an N8N node, a Make.com integration, and AI-assisted features, positioning itself less as a simple calendar and more as plumbing for social-media workflows. It also makes a point of compliance by using official OAuth flows and refusing to collect or proxy API keys, so users authenticate directly with each platform.

Key highlights

• Supports a wide roster of networks, including newer ones like Bluesky and Threads alongside the usual suspects.
• Self-hosted and hosted versions currently share the same feature set—no artificial tiering.
• Built for automation: public API, Node.js SDK, N8N node, and Make.com support.
• Licensed under AGPL-3.0, a copyleft choice for infrastructure meant to be hosted.

Verdict

Teams that want to own their social-media tooling—or wire scheduling into larger automation pipelines—should look here. If you just need a lightweight personal scheduler and do not care about self-hosting, the hosted option exists, but the project’s real value is in the control it offers.